Victoria II: A House Divided is the first expansion for Victoria II. It was announced by Paradox Interactive on 8 June 2011 at the Electronic Entertainment Expo 2011[1] as an expansion pack with an aim on "[improving the] political and economical aspects of the game, with focus on the American Civil War era". It was released on 2 February 2012, although it is currently only available for purchase by download. On 30 March 2012, Virtual Programming released the OS X port of A House Divided. It includes:

Major Features

Economics:

Trade goods have more detailed information to assist with decisions regarding the best factories to build

Railroads are now more expensive and terrain dependent (e.g. no more maximum railroads throughout the desert)

Foreign investment in building infrastructure and factories in other countries can strengthen their ties to you and provide a market advantage

Countries can invest in projects being done by local capitalists

War:

War justifications can be used to create a Casus belli on your target and reduce infamy

New starting point in 1861, allowing players to experience the US Civil War from the start

Rally points are available to manage new unit construction (both naval & land)

Military leaders can gain prestige, providing morale and organizational bonuses (moving leaders to different armies causes a prestige reduction)

Politics:

Party loyalty is a new national focus that can help influence elections

Civilization now has various new reform paths, including new reform types (military & economic)

A new system of popular movements that can be appeased or suppressed, but if ignored, will become the revolutionaries of tomorrow

New decisions including the ability to spread political ideology

China is now divided into cliques, known as substates, allowing for more interaction in the Far East.

Diplomacy:

To make management of Spheres of Influence easier, maximum influence now deducts from your strongest competitor